The Assos Powerstatic Plus Long Sleeve Base Layer has all of the amazing comfort and performance of the standard Powerstatic Long Sleeve Base Layer, but the Plus is specifically designed for use as the first layer against your skin on days when the temperature is 40 degrees and below. The Plus is unique in that it has an extra layer of insulation throughout the garment, and it has a zippered neck for optimum temperature regulation. It's ideal when combined with an Intermediate Evo Long Sleeve jersey and a jacket such as the Fugujack or the Airjack 851.